Answer:
He missed 10 questions and got 30 right
Step-by-step explanation:
So we could do 0.75 times 40 and we would get 30
So he got 30 questions right which isn't too bad
The range {20,28,36,40}
40-20= 20
The surface area of a solid is just the total area of all its faces. We know a cube has 6 identical faces with area s^2 where s is the side length.
So 6s^2 is the surface area. We can use this to find s.
6s^2 = 600
s^2 = 100
s = 10 cm
Sector area = (centl angle / 360) * PI * radius^2
sector area = (32 / 360) * PI * 8.5 * 8.5
sector area =
<span>
<span>
<span>
0.0888888889
</span>
</span>
</span>
* 3.14159 * 72.25
<span><span><span>sector area =
20.1760061531
</span>
square mm
Source:
http://www.1728.org/radians.htm
</span> </span>
